Why do we use polymorphism in Java with example?

Advantages of Polymorphism

Polymorphism is one of the OOPs feature that allows us to perform a single action in different ways . For example, lets say we have a class Animal that has a method sound() . Since this is a generic class so we can’t give it a implementation like: Roar, Meow, Oink etc.

Advantages of Polymorphism It helps the programmer to reuse the codes , i.e., classes once written, tested and implemented can be reused as required. Saves a lot of time. Single variable can be used to store multiple data types. Easy to debug the codes.

The most common use of polymorphism in OOP occurs when a parent class reference is used to refer to a child class object . Any Java object that can pass more than one IS-A test is considered to be polymorphic.